Take it once this is done if a problem reoccurs the code will flash up again if you run the diagnostic? Strange but when I refilled the air con gas the low refreidgerant fault code went of it's own free will when I re-ran the diagnostic after refill.

 

Could you please help me to unterstand what is the meaning of this error code?. I ran the DTC as mentioed.

Eb1 B22

Thanks
Husky

 

Thanks Matt,

How about adding this thread to the stickys too?

 

It should read B1822, but I could not find it, can you check again?

most codes explained for model >1996:

 

I am sorry. It is

Eb1 22

Thanks
Husky

 

just ran the A/C diagnostic.. I was able to get the recirculation LED to blink but was not able to get the desplay to show the "di R" (I presume this is to get the computer to read the correct directory). With a blank screen only, i tapped the Right-side AUTO button one time and my displayed showed "E F F" could that possibly mean the whole system is in failure??

I state the system failure issue because, no air blows through any of the vents and it doesn't sound like there are any fan motors operating.

I believe I'm starting at the right place in the threads to get this fixed, am I??
Thanks
TPD

 

Hi TPD welcome. EFF means no error codes. But it sounds like the blower/blower regulator is gone. You do have to remove this unit for jump test. Connect 12V to the motor (not the regulator) if it blows fine, then regulator gone. Of course check the fuses first. God bless and good luck.

 

hi everyone, i tried to do the a/c diagnostics but i could only get as far as the blinking recirc light but nothing comes out on the screen, no di R. what could i be doing wrong?

 

Yours a 1996 W210? Does it have a LCD A/C display? If so, have you pressed the auto button after the ec blink.

 

not sure too, Matt will probably know.

 

You need to connect it to a scanner such as SDS or Carsoft. You could have a bad control unit.

 

I read these out today - thanks for the sticky!!!
got EB1234 and EB1459 - just captured video on my cell phone and review at the computer.. Took a bit to connect - the error like B1459 appears
as

Eb1            459

on the LCD

 

i ran this test and got 231 which shows ECT sensor. I looked at the sensor readings and sensor 1 (in car temp) is always showing 261. My prob is the cold starts, the blower comes on full blast, doesn't wait for warm up. ??

 

A possible reason for the high initial fan speed is that the AC control is seeing a very high in car temperature and therefore will adjust the fan accordingly. What is interesting is that you do not have a fault for a faulty in car temp sensor, which like you say is providing faulty temp data-----

The faulty ECT is an issue because the engine management system will default to temps stored in the engine conrol module. My point is that the defaults are not actual and therefore will have long term impacts on gas mileage and your AC control units ability to make quick temp adjustments.

I would clear all the faults and get the ECT changed. Then recheck the faults. Ding How!!

 

is it can work in W 210 E 240 year 2001, because in my AC don't have display lcd, only in abdometer has display LCD

 

Hi I ran this test today and after looking through the DTC Codes

Eb1 419- Compressor Electromagnetic Clutch(A9k1)
Eb1 424- Activated Charcoal Filter Actuator (A32m2) : OPEN....what does this mean?
Eb1 239- I could not locate.

This is for a 97 E420 Dual Climate zones.

past problems with AC showed...
1. lots of hissing(vacuum leaks?)
2. cool air on pass. side not drivers(Vent far right and middle right vent, cold. No longer does this anymore, all warm)
3. Sometimes the middle vents will work and at others, nada.

I actually did a vacuum and recharge and they said the pressures were still good. After continuing with the service the AC blew cool again, unfortunately maybe a month later it blew warm again...

 

The code for the electromagnetic clutch will shut you down completely. Can you rotate the compressor by hand?

 

Actually Matt, I have not tried this. I figure the compressor still has some play since the belt spins it appropriately when the car is turned, on. If i do check this manually, should I remove my belt first?

 

Does anyone on the list know which of the Real-time temperature values displayed on the control unit are C and which are F? I read Steve Brotherton's article which indicated that there are some of each. I get an evaporator temp of 38 on a 45 degree (F) day. If that's an F reading all's OK. If its a C reading then I would assume that the evap. temp. sensor's going or gone bad.

All functions appear normal to me but I've had the car only a month so I'm not sure. I do note that the blower comes on immmediately rather than waiting for water temp to come up as on my 126's.

 

It's very funny, there are times when there is a temp fault generated by the sensor, the AC control unit will know that's not plausible and will go to its stored data and function and I believe that is in C and it wil revert back to the coverted data when the sensor is replaced and working.

FYI I would check your faults, the fan should not come on full blast unless it is very hot in the car. With heat it will gradually come up in speed as the coolant temp increases to at least 40C.

 

I think they're always in the same units for all of the readings.

 

Hi All -

I came up with the following DCT codes on my 2002 E320 4Matic after having some issues with the EC button (not turning off except for when the front Defrost setting was used)

B1232 - Refrigerant pressure sensor (B12)
B1234 - Sun sensor (B32)
B1241 - Refrigerant fill


Are any of these easily fixable from a DIY standpoint, or should I leave it to my mechanic?

**note the EC on/off works now after resetting the fault codes.

Thanks!:thumbsup:

 

Post the

sensor values. Not just the errors.
The 2 top just ignore in the face of the low r134a error.
The sun sensor error just ignore in the face of everything.
Yes it is an easy Diy.

 

sensor values. Not just the errors.
The 2 top just ignore in the face of the low r134a error.
The sun sensor error just ignore in the face of everything.
Yes it is an easy Diy.

Apologies for the n00b question here, but I missed the part on how to retrieve the sensor values from the error codes? or is that a completely different process?

thanks!:bowdown:

 

Is there any (grave) consequence if the failure B1234 - Sun sensor (B32) remains unfixed, except for the inconvenience of manually adjusting the fan speed?

 

No grave consequences of which I am aware. On several CC threads several people have said to ignore this fault code but I am of the opinion to replace the sensor if it goes bad. As stated previously, if the sun sensor is not working, your CC is not performing as designed.

 

You are correct the IGNORE advice is very poor at the very least. The sun sensor is apart of the AAC that automatically tells the fan speed to increase. If you ignore the fault and do not fix the sun sensor the AAC does not work to design.

Ignoring any fault on these cars just leads to more problems or being mis diagnosed. All faults are important and help to quickly resolve the issue.

 

Please refrain FROM THE Moronic WTFS statements and lack of knowledge postings.
The sun sensor is hardly central to the operation of the CC.
It is the feature most often not even noticed by mb owners.
It has no detrimental affect to ac when faulty or failed.
It slightly boosts fan speed when going from shade into sun etc.

Go back to your WIS and stop being so annoying, it really is getting tiring.
And tell your kids to bring my mirror back:thumbsup:

 

The sun sensor increases the cabin fan speed by about 3% in the presence of high ambient lighting.

I don't know about you, but I can't feel a 3% difference in airflow. And if the air isn't coming fast enough, I can hit the "+" button.

I say forget about it. It's a pain to repair, and is completely unnecessary.

 

I am inclined to agree with Matt, $40 bucks and time for the repair are not worth if the fan speed button does the same job manually.

 

That's a load of BS-----------------there are no percentages associated with the feature----if its sunny(and what does sunny mean) the fan will zoom to the high------WTFS 3%